test ruby2.1.2 on travis-ci
test ruby2.1.2 on travis-ci

steigr/websocket-client-simple,rpijpker/kerst-2016-localhost,shokai/websocket-client-simple,steigr/websocket-client-simple,shokai/websocket-client-simple,shokai/websocket-client-simple,steigr/websocket-client-simple